User`s guide

1–Introduction
Feature Details
1-4 ISR654606-00 A
Serial scheduling allows you to configure migration jobs that can have the same or
different priority. If you need to configure a large number of jobs (256, for
example), you can configure them in batches such that the first four to eight jobs
are scheduled at priority 1, the next four to eight jobs at priority 2, and so on. This
scheduling arrangement ensures that when the serial schedule starts, no more
than four to eight jobs are running simultaneously, and DMS can provide better
performance.
In order to achieve this, serial scheduling requires a job priority for each data
migration job. Multiple data migration jobs can have the same priority. Migration
jobs with the same priority are run together. Job priority 1 is highest and job
priority 255 is lowest. After all the jobs are configured for serial execution, you
must schedule this batch of serially-scheduled jobs. The batch can be started
immediately or at a later time. The Serial Data Migration Jobs Options dialog box
provides an easy way to start or schedule the batch.
After the serial batch starts to run, all jobs having the highest priority are
completed before the jobs scheduled at the next priority level start to execute.
Only one serial schedule can be active at any time.
Data Migration Job Groups
The mpx Manager uses the concept of job groups to associate data migration jobs
with user-defined groups. A job group allows better management of data migration
jobs. You can create a maximum of eight job groups. The mpx Manager also has
commands to remove and edit job groups.
The groups can be classified for data migration jobs related to application type or
server class. For example, a data migration job related to the Microsoft Exchange
application could be part of group named “Exchange,” and a data migration job
related to a payroll application could be part of group named “Payroll.” The data
migration jobs are tracked separately within each group. You can schedule the
data migration of all LUNs related to one application, followed by other
applications.
If no group is defined, all jobs are assigned to the default group, Group 0. You
cannot delete Group 0.
Array Properties
DMS discovers the Fibre Channel target ports and forms an array when at least
one data LUN is presented to the DMS running in the MPX200 from that array. If
no data LUN is presented to the MPX200, all array ports are shown in the mpx
Manager GUI and CLI as target ports. After the LUNs are presented to the
MPX200, a target rescan is required to form an array (see “target rescan” on
page 5-56).